Quadrangle is an unconventional documentary about two “conventional” couples that swapped partners and lived in a group marriage in the early 1970s. Coming out of the era of free love, and struggling with the monotony of marriage and suburban life, these suburban middle class couples began swapping partners. This four-way affair became a kind of domestic living experiment when the two couples moved into one home, along with their children. While their individual marriages were failing, they found that together they were happy and thought they had discovered an alternative to divorce - a brave new world that would pave the way for how couples would live in the future. Instead it unraveled. Both couples divorced and married their foursome partners, but they could never truly separate because they were bound by the children they shared.